This distinction is crucial. Because it is data-driven, the replay viewer is interactive. You can view a "ghost" of the player’s movements while playing the map yourself, or load a replay and take control of the camera. This has given rise to "spectator edits"—where content creators slow down gameplay, apply cinematic camera shakes, and color-grade the video to make a standard play look like a psychedelic music video.
[Tool/Resource] A better way to view your osu! replays (no game launch required) osu replay viewer
To the uninitiated, an osu! replay is simply a recording of a match. But unlike a standard video file (like an MP4), an osu! replay file ( .osr ) is remarkably lightweight. It doesn’t store video frames; it stores data. It records the X/Y coordinates of the cursor, the precise millisecond a key was pressed, and the rhythm of the hit. This distinction is crucial
Originally known as osu-replay-editor , this tool (now integrated into Circleguard) is the gold standard for forensic replay analysis. This has given rise to "spectator edits"—where content
An is a tool that parses .osr (osu! replay) files to visualize, analyze, or extract gameplay data. Unlike watching a video recording, a replay viewer reconstructs the play using the original hit objects, timing, and cursor movements.
// also check if any frame exact click within tiny window const nearClick = replayFrames.find(f => Math.abs(f.timeMs - currentTime) < 45 && f.click); if (nearClick) isClickNow = true;